Axiom Home Page Forums General Discussion Stereo Out with the new and in with the newer

Whoa the infrasonics have made me so damned nauseous. My sense of balance is out of whack.

Never mind Steely Dan, listen to Flight of the Cosmic Hippo by Bella Fleck.

Two 500s and an 800 are too much for this 4200 ft^3 room. I can't watch or listen to anything without feeling like I'm in a pressure chamber.

You wuss. Show some backbone!

The actives taught me there's such a thing as too much amp power and the dual 500s added to the 800 taught me there's such a thing as too much bass. And I still have a ton of headroom on those subs.

Perhaps you need to dial it a bit back ... not sure that your critical listening ear protection will do much below 30Hz ... especially if your cranking it to 120 dbSPL

Dialing it back is a reasonable suggestion. The subs in sum are calibrated to 75dB using the tone from the receiver (BTW that took more work than time and phase aligning). It sounds and feels wonderful for movies and music except for the fact my ear drums feel like compressed air is being pumped into them. I guess that's what good subbage is supposed to feel and sound like.

Point taken. I shall attenuate and gauge the resulting physiological and emotional responses.

Rich, the subs are dialed in more perfect than yesterday. Volumes are lower. Here's what I did.

Yesterday I was using the Onk's tone generator and my SPL meter. Today, I decided to use the tone generator with the Onk mic. With the Onk mic, I found that the summed SPL was 79dB - 4dB too hot. I adjusted each of my three subs to 69dB and voila! I got a sum total of 75dB.

I walked around the room and the bass was nice and smooth like yesterday. The real test though was music. I find some songs to be good at the calibrated setting. Others I have to bump up by as much as 1.5dB.

I am very satisfied with the sound from the single 800 and twin 500s. Of course all this will have to be re-calibrated again once the actives are in the man-cave. That should be interesting because I was planning on feeding the twin 500s directly from the DSP boxes. There is no distance setting on the DSP boxes however so I don't know how I'm going to time-align the 500s. Physical location may be an option.

It's interesting how all three subs are noticeably better than any two or one. This has to do with my room size. I am surprised how much I would miss even just for music with twin 500s. The 800 adds deep textures that once heard are difficult to forget.

This is a great tune to hear what I'm describing. There are growling guitar bass lines whose characters are only fully revealed with the 800 in my room:

https://open.spotify.com/track/5kHlvtGBiLEPcUBhd35CSj?si=Ct72nL7uSau-hO7m_DBdDg

The 500s add urgency and an additional kick to the bass. A sort of hardness from the bass drum pedal contacting the skin that is only hinted at by the 800. All subs are set to linear.

Mojo,

Speakers are 7.5 feet apart, 18.5 inches from the wall and around 8-9 feet from MLP. BGC are both at 0. (There is no back wall behind the MLP. It’s one large room with the dining room at the rear.)

Unfortunately been too busy for critical listening but I can tell you that ‘Pappa Was A Rolling Stone’ sounds fantastic!!!